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针对目前工程图纸识别中存在的几项难点技术，提出基于行程编码的矢量化方法，对小弯度直线的纠正问题、特征线段的延伸与合并算法进行了研究．同时使用图像局部形态分析的方法，直接在原图像上进行识别，保证了图像信息的完整性和可检测性．该项研究结果在建筑工程图纸的自动识别及自动计算中得到了较好的应用．
Aiming at several difficult techniques in current engineering drawing recognition, a vectorization method based on run length coding is proposed. The correction of small crooked straight lines and the extension and combination of characteristic line segments are studied. At the same time, the method of local morphological analysis of images is used to identify directly on the original image to ensure the integrity and detectability of the image information. The results of this study have been well applied in the automatic identification and automatic calculation of architectural drawings.